OK, I agree there are incentives and encouraged behaviors. But what changes are the people and, well, time. The USSR of 1957 was very different than the one in 1982, for example, and yet they were under the same system. There are countless other examples.
Point is that debating what systems are better is little more than an exercise in mental masturbation if you do not consider those "other" all-important factors for how any such system is operated and executed.